720171179641 has 3 divisors (see below), whose sum is σ = 720172028271. Its totient is φ = 720170331012.

The previous prime is 720171179603. The next prime is 720171179657. The reversal of 720171179641 is 146971171027.

The square root of 720171179641 is 848629.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146971171027 = 31 ⋅4741005517.

It can be written as a sum of positive squares in only one way, i.e., 124341569641 + 595829610000 = 352621^2 + 771900^2 .

It is not a de Polignac number, because 720171179641 - 2²¹ = 720169082489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720171179591 and 720171179600.

It is not an unprimeable number, because it can be changed into a prime (720171173641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 424315 + ... + 1272943.

It is an arithmetic number, because the mean of its divisors is an integer number (240057342757).

Almost surely, 2^720171179641 is an apocalyptic number.

720171179641 is the 848629-th square number.

720171179641 is the 424315-th centered octagonal number.

It is an amenable number.

720171179641 is a deficient number, since it is larger than the sum of its proper divisors (848630).

720171179641 is an frugal number, since it uses more digits than its factorization.

720171179641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697258 (or 848629 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 46.

The spelling of 720171179641 in words is "seven hundred twenty billion, one hundred seventy-one million, one hundred seventy-nine thousand, six hundred forty-one".